Equilibrium Question 264
Question: The $ pH $ of $ 0.1M $ solution of the following salts increases in the order [IIT 1999]
Options:
A) $ NaCl<NH_4Cl<NaCN<HCl $
B) $ HCl<NH_4Cl<NaCl<NaCN $
C) $ NaCN<NH_4Cl<NaCl<HCl $
D) $ HCl<NaCl<NaCN<NH_4Cl $
Show Answer
Answer:
Correct Answer: D
Solution:
$ NH_4Cl $ undergoes cationic hydrolysis hence pH is $ >7 $ because the solution due to cationic hydrolysis in acids. NaCN undergoes anionic hydrolysis hence pH is >7. HCl is strong acid and NaCl is neutral solution. Hence the pH of given solutions will increases. $ HCl<NaCl<NaCN<NH_4Cl $
